JPH0523058U - Weighing device - Google Patents

Abstract

(57) [Summary] [Purpose] There are multiple items to be weighed on the weighing chain.
Improve the weighing accuracy by not putting it on. [Structure] Measuring guide 11 and each measuring guide
Entrance side of the weighing guide that is not in contact with
Plan for carrying in the guide part 10 for carrying in and the exit side of the guide part for weighing
The inside 9 and the guide for carrying in the goods along the guide for carrying in
Carry-in means 17 that conveys to the exit side and upward cargo
Guide for loading articles that have a flat surface and are transported by the transport means
Received at the exit side of the section and carry out the received article 14
Weighing chain 20 that conveys toward the guide side, and weighing
Entrance of the guide section for unloading articles carried by the chain
The receiving side receives the goods and outputs them at the carry-out guide section.
Unloading means 19 for carrying to the mouth side and carrying of the measuring chain
The weight of the article passing through the weighing guide while being held on the surface.
Driving the weighing means 13 and the weighing chain
And a driving means 21.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a weighing device for a weight sorter, and more particularly to a weighing device for weighing an article to be weighed while placing it on a chain and transferring it.

[0002]

[Prior Art]

 The conventional weighing device described above is shown in FIG. Reference numeral 1 shown in the figure is a weighing chain guide rail 1 (hereinafter, referred to as a weighing guide 1), which is supported by a weighing load cell 2. The load cell 2 weighs the article 3 passing through the weighing guide 1 and outputs a weighing signal to a control unit (not shown). On the inlet side (left end side in the figure) and outlet side (right end side in the figure) of the weighing guide 1, there is a chain guide rail for carry-in (hereinafter referred to as carry-in guide 4) without being in contact with the weighing guide 1. .) And a carry-out chain guide rail 5 (hereinafter referred to as a carry-out guide 5) are fixed to a base (not shown). The carrying guide 4, the weighing guide 1, and the carrying-out guide 5 are hung on a carrying chain 6 guided by the guides, and the carrying chain 6 faces upward. And is driven by the motor 7 in the direction of the arrow in the figure. The motor 7 is attached to the base.

When the object 3 to be weighed is supplied to the load carrying surface of the carrying chain 6 traveling on the carry-in guide 4, as shown in FIG. 5, the weighing device carries the article 3 while carrying it. The chain 6 travels on the weighing guide 1 through the carry-in guide 4. Then, when the article 3 moves on the weighing guide 1, the load cell 2 weighs the article 3 and outputs a weighing signal. The transport chain 6 holding the weighed articles 3 travels through the carry-out guide 5 after passing through the weighing guide 1, and transports the weighed articles 3 to the subsequent stage.

[0004]

As shown in FIG. 5, in the conventional weighing device, the tension of the chain 6 is received by the carry-in guide 4, the carry-out guide 5, and the sprockets 8a to 8c. The load cell 2 is provided with the weighing guide 1 between the carry-in guide 4 and the carry-out guide 5 and the motor 7 on the base so that the load cell 2 has the motor 7 and the sprocket 8 Since the weight of the load cell 2 and the like are not applied, the load cell 2 can be downsized accordingly. As a result, the upper limit value of the allowable weighing range of the load cell 2 can be brought close to the maximum weight of the article 3 to be weighed, so that high weighing accuracy can be obtained.

However, for example, as shown in FIG. 5, a state in which three (or a plurality of) articles 3 are placed on each of the three guides 1, 4, 5 via a chain 6 is shown in the figure. Similarly, the article 3 on the weighing guide 1 is weighed with a plurality of articles 3 placed on the carry-in guide 4 or the carry-out guide 5 and the weighing guide 1 via the chain 6 as well. In some cases, there is a problem that a measurement error occurs. This is based on the number of articles 3 placed on the chain 6 or the distance between the articles 3 placed on the weighing guide 1 and the articles 3 placed on another guide 4 or 5 on the weighing guide 1. This is because the tension of the chain 6 running on the vehicle changes, and the weight of the article 3 is not accurately transmitted to the load cell 2 due to the change in the tension.

When the article 3 to be weighed is supplied to the carry-in guide 4 by, for example, a supply conveyor (not shown), the article 3 is transferred from the supply conveyor to the carrying chain 6 that travels the carry-in guide 4. At this time, an impact is applied to the transport chain 6, the tension of the transport chain 6 changes due to this impact, and if weighing is performed when this tension changes, there is a problem that a weighing error occurs as in the above case. An object of the present invention is to provide a weighing device that solves the above problems.

[0007]

[Means for Solving the Problems]

 This invention is directed to a weighing guide section, a loading guide section on the inlet side of the weighing guide section and a loading guide section on the outlet side of the weighing guide section, which are provided in a non-contact state with the weighing guide section. A carry-out guide part, a carry-in means for carrying articles along the carry-in guide part toward the exit side of the carry-in guide part, and an upward load carrying surface inside the carry-in plan, for the weighing. The article guided by the guide section and the carry-out guide section and traveled and conveyed by the carry-in means is received at the exit side of the carry-in guide section, and the received article is passed through the weighing guide section and Weighing traction force transmitting means to be conveyed toward the carry-out guide portion side, and an article conveyed by the weighing traction force transmitting means is received at the entrance side of the carry-out guide portion and the received article is guided to the carry-out guide. Transport to the exit side of the unit Means, a weighing means for weighing the weight of an article passing through the weighing guide portion while being held on the load carrying surface of the weighing traction force transmitting means, and the weighing traction force transmitting means provided on the fixed side. And driving means for driving.

[0008]

[Action]

 According to the weighing apparatus of the present invention, when an article to be weighed is supplied to the carry-in guide section, the carry-in means receives the article, and the received article is directed toward the exit side along the carry-in guide section. Transport. The weighing traction force transmitting means receives the article being conveyed by the carry-in means on the loading surface at the exit side of the carry-in guide section, and holds the received article through the weighing guide section while carrying out the carry-out guide. It is conveyed toward the entrance side of the department. Then, when the article passes over the weighing guide, the weighing means weighs the article. Then, when the weighing traction force transmitting means travels to the entrance side of the unloading guide while holding the weighed articles, the unloading means receives the weighed articles from the load carrying surface of the weighing traction force transmitting means. Then, the received article is conveyed to the exit side along the carry-out guide section.

Further, since the carrying-in means and the carrying-out means are mechanically separated from the weighing traction force transmitting means, even if the number of articles carried by the carrying-in means and the carrying-out means changes, It is possible to always keep the tension of the traction force transmission means for measurement being conveyed constant.

[0010]

【Example】

 A first embodiment of the weighing device of the present invention will be described with reference to FIGS. Although not shown in the figure, this weighing device constitutes a weight sorter by a conventionally known distribution device provided in the latter stage, and the weighed articles are discharged from the carry-out guide section 9 to be distributed in the latter stage. Transport to equipment. Then, the distribution device selects a weight rank corresponding to the measured value of the article from a plurality of predetermined weight ranks, discharges the article to the position of the weight rank, and thereby performs the weight selection of the article. Hereinafter, the weighing device will be described by omitting a detailed description of a conventionally known dispensing device.

As shown in FIG. 1, the weighing device is provided with a weighing means 13 on an upper surface of a base 12, and the weighing guide portion 11 is supported by the weighing means 13. The weighing means 13 weighs the weight of the article 14 passing on the weighing guide portion 11, generates a weighing signal corresponding to the weighing value, and sends the weighing signal to the distribution device. On the inlet side (left side in the figure) of the weighing plan interior 11, a loading guiding section 10 is arranged in a non-contact state with the weighing guiding section 11, and the loading guiding section 10 supports the supporting section 15 It is attached to the base 12 via. Further, on the outlet side (right side in the figure) of the weighing guide unit 11, a carrying-out guide unit 9 is arranged in a non-contact state with the weighing guide unit 11, and the carrying-out guide unit 9 is a supporting unit. It is attached to the base 12 via 16. Then, the transport chain 18 which is a component of the carry-in means 17 travels in the carry-in guide unit 10, avoids the weighing guide unit 11 and travels in the carry-out guide unit 9, so that the guide units 9 and 10 travel. Is hung on. The carrying chain 18 also travels through the carrying-out guide portion 9 and serves as one of the components of the carrying-out means 19. Further, the traction force transmission means 20 for weighing is hung on the guide portions 9, 10, 11 so as to travel along the loading guide portion 10, the weighing guide portion 11 and the unloading guide portion 9. The conveying chain 18 and the measuring traction force transmitting means 20 are driven by the driving means 21 so as to travel in the direction from the carry-in guide portion 10 to the carry-out guide portion 9.

As shown in FIG. 1, the weighing guide portion 11 is provided with two plate-like bodies 22 having a substantially inverted triangular front shape, and these two plate-like bodies 22 are as shown in FIG. They are connected in parallel at a predetermined distance. A measuring guide rail 23 for guiding the measuring traction force transmitting means 20 (hereinafter referred to as the measuring chain 20) is provided on the upper surface of each plate-shaped body 22. The measuring guide rail 23 is a groove having a rectangular cross section, and the groove direction is parallel to the horizontal direction, and the measuring guide rails 23 are formed to be parallel to each other.

The weighing means 13 includes a load cell (not shown), and the load receiving portion 24 of the load cell is connected to the lower end portion of the weighing guide portion 11 to support the weighing guide portion 11.

As shown in FIG. 1, the carry-in guide portion 10 has two main bodies 25 each having a horizontally long front shape, and these two main bodies 25 have predetermined intervals as shown in FIG. Are arranged in parallel with each other. The two main bodies 25 are attached to the base 12 via the supporting portions 15, respectively. A weighing guide rail 26 for guiding the weighing chain 20 and a carry-in guide rail 27 for guiding the carrying chain 18 are provided on the upper surface of each main body 15. As shown in FIG. 2, the guide rails 26 and 27 are formed in parallel with each other when viewed from above the carry-in guide portion 10. Each of the guide rails 26 and 27 is a groove having a rectangular cross section, which is equivalent to that provided in the weighing guide portion 11.

As shown in FIG. 2, the two weighing guide rails 26 of the carry-in guide section 10 are provided on the inner upper surfaces of the two parallel main bodies 25 which are close to each other, and are shown in FIG. As shown in the drawing, a reaction part 28 is formed along the inside of the bent part of the semicircle at the left end of each body 25, and gradually extends from the upper end of this reversal part 28 along the upper surface of the body 25 in the upper right direction in the figure. The inclined portion 29 is formed so as to face. The right end of each inclined portion 29 of the two weighing guide rails 26 faces the left end of the weighing guide rail 23 of the weighing guide portion 11. The two carry-in guide rails 27 are provided on the outer side of the two measuring guide rails 26 with the two measuring guide rails 26 sandwiched therebetween, and as shown in FIG. From the inlet side reversing portion 30 provided along the outer periphery, the horizontal portion 31 formed horizontally from the upper end of the inlet side reversing portion 30 to the upper surface of the main body 25, and from the right end portion of the horizontal portion 31. The main body 25 comprises an outlet side reversing portion 32 formed along the outer circumference of the bent portion at the right end and having a length of about 1/4 circle. As shown in FIG. 1, the horizontal portion 31 of the carry-in guide rail 27 has its left end located slightly above the left side of the inclined portion 29 of the weighing guide rail 23, and its right end located at the right end of this inclined portion 29. It is formed so as to be at substantially the same height position as. A tension pulley 33 of the transport chain 18 is provided at the right end of the main body 25 on the outlet side, at the lower right position of the outlet side reversing portion 32 of the carry-in guide rail 27 in the figure.

As shown in FIG. 1, the carry-out guide portion 9 is symmetrical and equivalent to the carry-in guide portion 10, and is formed to be slightly shorter than the carry-in guide portion 10 in the transport direction. There is. That is, the two main bodies 34, each of which is attached to the base 12 via the support portion 16, and the weighing guide rail 35 and the carry-out guide rail 36, which are provided along the upper surface of each main body 34. And a tension pulley 37 of the carrying chain 18 provided at the left end of each main body 34. Then, the left end of the inclined portion 38 of the weighing guide rail 35 that gradually descends in the lower right direction in the drawing in accordance with the transport direction faces the right end of the weighing guide rail 23 of the weighing guide portion 11, and this left end is It is formed at substantially the same height as the left end of the carry-out guide rail 36.

The annular carrying chain 18 is provided with a load carrying surface on the outer circumference, and can be bent in a direction in which the load carrying surface is inward and outward. As shown in FIGS. 1 to 3, each of the two transport chains 18 passes through the carry-in guide rail 27 of the carry-in guide unit 10 and goes under the tension pulleys 33 and 37. The sprocket (39, 40, 41) rotatably provided on the base 12 through the respective shafts of the unloading guide rail 36 through the unloading guide rail 36 while avoiding the weighing guide portion 11. 64, 62, 61). However, the sprocket 64 is not shown in the figure. The two transport chains 18 run in the clockwise direction (the direction of the arrow) in FIG. 1 at the same speed. The transport chain 18 is formed thicker than the depth of each guide rail, and can run with the article 14 placed on the load carrying surface. The carrying chain 18 and the carrying-in guide portion 10 constitute the carrying-in means 17 according to claim 1, and the carrying chain 18 and the carrying-out guide portion 9 constitute the carrying-out means 19 according to claim 1. ..

The measuring chain 20 is a chain formed in the same annular shape as the conveying chain 18. That is, the weighing chain 20 is also provided with a load carrying surface on the outer circumference, and can be bent in a direction in which the load carrying surface is inward and outward. As shown in FIGS. 1 to 3, the two weighing chains 20 respectively include a weighing guide rail 26 of the loading guide section 10, a weighing guide rail 23 of the weighing guide section 11, and a unloading guide. It passes through the weighing guide rail 35 of the part 9 and engages with the sprockets (62, 50, 49), (63, 52, 51) provided on the respective shafts, in the same direction as the transport chain 18 and in the same manner. Drive at the speed of. Then, similar to the transport chain 18, the article 14 can be run with the article 14 placed on the cargo carrying surface. However, the sprockets 62, 63 attached to the shaft 43 and engaging with the measuring chain 20 are not shown in the figure.

The driving means 21 is a motor (hereinafter referred to as the motor 21) and is attached to the base 12. A pulley 42 is attached to the rotary shaft of the motor 21, and a power transmission belt 45 is wound around the pulley 42 and a pulley 44 attached to the end of the shaft 43. When the rotation shaft of the motor 21 rotates, the four sprockets 39, 62, 63, 64 attached to the shaft 43 rotate, and the rotation of the sprockets causes a total of four weighing chains 20 and a transport chain. 18 runs in the direction of the arrow in the figure.

Reference numeral 46 shown in the drawing is a photoelectric switch. The photoelectric switch 46, when detecting the article 14 passing in front of it, generates a signal and transmits it to the weighing means 13 so that the weighing means 13 can weigh.

The operation of the weighing device will be described. Items 14 that can be weighed by this weighing device can be held while straddling two transport chains 18 as shown in FIG. 3, and can be transported in this retained state. It has a shape that allows When the article 14 to be weighed in such a shape is supplied to the load carrying surfaces of the two transport chains 18 traveling on the entrance side of the carry-in guide rail 27 of the carry-in guide unit 10, as shown in FIG. Since the carrying surface of the carrying chain 18 is above the carrying surface of the weighing chain 20, the carrying chain 18 holds the article 14 and the exit side of the carrying-in guide unit 10 (right side in the figure). ). However, the carrying surface of the carrying chain 18 is at substantially the same height as the carrying surface of the weighing chain 20 on the exit side of the carrying-in guide rail 27. It is inverted in the lower right direction along the outlet-side inversion portion 32. On the other hand, the weighing chain 20 passes through the outlet of the carry-in guide unit 10, moves horizontally as it is, and travels on the weighing guide rail 23 of the weighing guide unit 11. Therefore, when the transport chain 18 transports the article 14 to the exit of the loading guide section 10, the article 14 is transferred onto the weighing chain 20 at this exit, and the weighing chain 20 holds the article 14 and weighs it. It travels along the weighing guide rail 23 of the guide unit 11, passes through the weighing guide unit 11, and reaches the entrance side of the carry-out guide unit 9. Incidentally, when the photoelectric switch 46 detects the article 14 when the article 14 passes through the weighing guide portion 11, the weighing means 13 weighs the weight of the article 14 and outputs a weighing signal. However, the weighing chain 20 is gradually lowered toward the exit side from the entrance side of the carry-out guide section 9 toward the exit side reversing section 47. On the other hand, the transport chain 18 is reversed in the upper right direction in FIG. 1 by the tension pulley 37, and then is reversed along the entrance-side reversing part 48 of the carry-out guide rail 36 of the carry-out guide part 9 to be directed horizontally. Therefore, the load carrying surface of the transport chain 18 and the load carrying surface of the weighing chain 20 have substantially the same height on the inlet side of the carry-out guide portion 9. Therefore, when the weighing chain 20 conveys the article 14 to the entrance of the unloading guide portion 9, the article 14 is transferred to the conveyance chain 18 at this entrance, and the conveyance chain 18 holds the article 14 in a state of being held. Carry-out plan The car runs along the carry-out guide rail 36 in the interior 9 toward the exit side. Then, the weighed article 14 is conveyed to the distribution device at the subsequent stage.

As described above, since the weighing chain 20 and the transport chain 18 are separately provided, even if a plurality of articles 14 are placed on the transport chain 18, as shown in FIG. The tension applied to the measuring chain is not affected, and therefore the weight of the articles placed on the measuring chain can be accurately measured.

A second embodiment will be described with reference to FIG. In contrast to the first embodiment, the second embodiment differs from the first embodiment in that the two weighing chains 20 are hung on three sprockets (62, 50, 49) and (63, 52, 51). The power of the motor 21 is transmitted to the measuring chain 20 via the sprockets 62 and 63 to drive the measuring chain 20, and the power of the motor 21 is measured via the sprockets 62 and 63. Instead of transmitting the force to the motor 20, the interlocking device 53 is provided in the carry-out guide portion 9, and the power of the motor 21 is transmitted to the measuring chain 20 through the interlocking device 53 and the transport chain 18 to transfer the measuring chain 20. It is running.

In order to achieve this, the first embodiment has two weighing guide rails provided at the entrance side of the two weighing guide rails 26 provided at the carry-in guide section 10 and at the carry-out guide section 9. Although the reversing parts 28 and 47 are provided on the outlet side of the 35, instead of providing these reversing parts 28 and 47, as shown in FIG. 4, the sprockets 54 and 55 can be freely rotated at their respective positions. The sprocket 54, 55 is provided with the measuring chain 20 and is hung. Then, in the first embodiment, the lower traveling path of each weighing chain 20 is passed through three sprockets (62, 50, 49) and (63, 52, 51), but three sprockets are used. Instead of passing it through, run it in a loose state as shown in the figure. Further, in the first embodiment, the outlet side reversing portion 56 is provided on the outlet side of the two carrying-out guide rails 36 provided in the carrying-out guide portion 9, but instead of providing the outlet side reversing portion 56, A sprocket 57 is rotatably provided, and the transport chain 18 is hung on the sprocket 57. Then, the sprockets 59 and 55 are connected via the sprockets 57 and 58 and the interlocking chain 60 so that the rotation of the sprocket 59 can be transmitted to the sprocket 55. However, since the other parts are the same as those in the first embodiment, detailed description thereof will be omitted.

With the above configuration, when the motor 21 is driven, the power of the motor 21 is transmitted to the sprockets 39, 64 and the carrier chain 18, and the carrier chain 18 is shown in the same manner as in the first embodiment. While traveling in the direction of the arrow, the traveling of the transport chain is transmitted to the measuring chain 20 through the sprockets 59 and 57, the interlocking chain 60 and the sprockets 58 and 55, and the measuring chain 20 is moved. Drive in the direction of.

When the weight of the articles 14 is weighed by this weighing device, as in the first embodiment, the articles to be weighed are separated by a predetermined distance so that two or more articles 14 do not rest on the weighing chain 20. The articles 14 may be sequentially supplied to the entrance side of the carry-in guide unit 10. Since these articles 14 are sequentially weighed by the weighing means 13 as in the first embodiment, detailed description thereof will be omitted. Then, the weighed articles 14 are discharged from the outlet side of the carry-out guide portion 9 to the distribution device in the subsequent stage, and the weighing is completed.

However, in each of the above-described embodiments, the carrying chain 18 and the weighing chain 20 are used as the carrying means for the article 14, but instead of the carrying chain 18 and the weighing chain 20, the load receiving surface faces upward. The conveyor belts and metering belts of can be used.

In the above embodiment, the transport chain 18 and the weighing chain 20 are driven by one motor 21, but the transport chain 18 and the weighing chain 20 may be driven by separate motors. Good.

Further, in the above embodiment, one carrying chain 18 was made to travel through the carrying-in guide part 10 and the carrying-out guide part 9, but the carrying-in guide part 18 is carried out without running the one carrying chain 18. The transport guide section 10 and the carry-out guide section 9 may be driven by separate transport chains.

[0030]

[Effect of the device]

 According to the present invention, the carrying-in means and the carrying-out means are mechanically separated from the weighing traction force transmitting means. Therefore, even if the number of articles carried by the carrying-in means or the carrying-out means changes, The tension of the traction force transmission means for measurement that is being conveyed is always constant, which has the effect of improving the measurement accuracy as compared with the conventional measurement device.

Then, the weighing traction force transmitting means travels while holding the articles to be weighed, in addition to the weighing guide portion, in a short section between the exit section of the carry-in guide section and the entrance section of the carry-out guide section. Therefore, the section in which the traction force transmission means for weighing travels while holding the article to be weighed is shorter than before, and this makes it possible to make the supply interval of the article to be weighed supplied to this weighing device narrower than before. Therefore, there is also an effect that the weighing capacity (the number of weighings per hour) can be increased more than ever before.

When the article to be weighed is supplied to the carry-in means, a load (impact) is applied to the carrying force of the carry-in means, but since this load is not transmitted to the measuring traction force transmitting means, the measuring traction force transmitting means The effect is that the tension of the article does not change, and therefore the weight of the article can be measured more accurately than before.

[Brief description of drawings]

FIG. 1 is a front view of a weighing device according to a first embodiment of the present invention.

FIG. 2 is a plan view of the weighing device according to the embodiment.

FIG. 3 is a side view of the weighing device according to the embodiment.

FIG. 4 is a schematic front view of a weighing device according to a second embodiment of the present invention.

FIG. 5 is a schematic front view of a conventional weighing device.

[Explanation of symbols]

 9 Guide for Carrying Out 10 Guide for Carrying In 11 Guide for Metering 13 Metering Means 17 Carrying Means 18 Carrying Chain 19 Carrying Out Means 20 Metering Chain (Means for Measuring Traction Force) 21 Motor (Drive)

Claims (1)

[Scope of utility model registration request] 1. A weighing guide portion, and a carry-in guide portion on the inlet side of the weighing guide portion and an outlet side of the weighing guide portion which are respectively provided in a non-contact state with the weighing guide portion. Of the carrying-out guide part, carrying-in means for carrying articles along the carrying-in guide part toward the exit side of the carrying-in guide part, the carrying-in guide part having an upward load carrying surface, and the weighing device. The article carried by the carrying-in guide section and the carry-out guide section in sequence and conveyed by the carry-in means is received at the exit side of the carry-in guide section, and the received article is carried out through the weighing guide section. Metering traction force transmitting means for conveying toward the guide portion for guiding, and the article conveyed by the measuring traction force transmitting means for receiving at the entrance side of the carrying-out guide portion, and the received article for the carrying-out guide portion. Carrying out means to carry to the exit side A weighing means for weighing the weight of the article passing through the weighing guide portion while being held on the load carrying surface of the weighing traction force transmitting means, and a driving means for driving the weighing traction force transmitting means. A weighing device, comprising: